So, people have been complaining about the fact that they have tried to comment, but that Blogger is asking them to become a member in order to do so. Guys, you don't have to be a member. If you go to comment on a post, there will be 3 options to identify yourself.
1. Blogger USER NAME & PASSWORD: you need both, so that I can access you in the Blogger community
2. OTHER: Your name and if you have one, your website
3. ANONYMOUS: self explanatory
If you do choose to comment, just check one of the 3 boxes off, and hit submit.
So to answer your question, you don't have to be a Blogger to comment. But you could buy me chocolate and pretty things. I wouldn't mind that at all.